API assertion failure message to be displayed in my testNG report

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I am having multiple assertions (assertTrue) in my test method, I want to pass the assertion failure to my @AfterMethod on which ever assertion my test failed so that I can get the exact location where my API test failed. Is there any way to achieve this? Using Rest assured, Maven & TestNG.

Every @AfterMethod can accept a ITestResult as a parameter, which TestNG during execution natively injects the test result of the last @Test. So you can examine the ITestResult object and then proceed further.

Here’s a simple sample
import org.testng.Assert;
import org.testng.ITestResult;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.Test;

import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.StringWriter;

public class SampleTestClass {

public void passMethod() {

public void failMethod() {

public void afterMethod(ITestResult testResult) {
if (testResult.isSuccess()) {
Throwable throwable = testResult.getThrowable();
StringWriter sw = new StringWriter();
PrintWriter writer = new PrintWriter(sw);
System.err.println("****" + sw.getBuffer().toString());
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